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-5-5.5(1+6.5f)=-30.5
We move all terms to the left:
-5-5.5(1+6.5f)-(-30.5)=0
We add all the numbers together, and all the variables
-5.5(6.5f+1)-5-(-30.5)=0
We add all the numbers together, and all the variables
-5.5(6.5f+1)+25.5=0
We multiply parentheses
-33f-5.5+25.5=0
We add all the numbers together, and all the variables
-33f+20=0
We move all terms containing f to the left, all other terms to the right
-33f=-20
f=-20/-33
f=20/33
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